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Method for separating copper, arsenic and nickel and purifying copper electrolyte

A technology of copper electrolyte and electrolyte, which is applied in the field of separation and purification of arsenic, copper and nickel to achieve the effect of simple process, low cost and reduction of black copper powder

Active Publication Date: 2012-02-08
深圳慧欣环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the exchange capacity of ion exchange resin is limited, and new impurities and organic substances such as Na and Cl will be introduced into the electrolyte and pollute the electrolyte.
The disadvantages of the extraction method are strong extraction of As, weak extraction of antimony and bismuth, large loss of extraction agent, high cost, etc.
The precipitation effect of chemical precipitation method is not ideal, the amount of precipitant is large, and the treatment cost is high
These methods can only be used as auxiliary processes for copper electrolyte purification, and are difficult to apply in large-scale industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 1.6L of copper electrolyte, its composition is shown in Table 1, Pb-Ag alloy is used as anode, copper starting plate is used as cathode, and the current density is 200A m -2 , copper electrolyte temperature is 55 ℃, add bone glue, gelatin and thiourea. When Cu in the copper electrolyte 2+ When the concentration drops to 25.4g / L, adjust the current density to 100A m -2 Electrowinning copper removal to Cu 2+ The concentration is 0.42g / L. The current density is 200A·m -2 The obtained cathode copper copper content is 99.96%, and the arsenic content is 0.000602%. The current density is 100A·m -2 47.62g of cathode product was obtained. The copper content in the product was 81.43%, and the arsenic content was 6.17%.

[0019] Sulfur dioxide was introduced into the solution after electrowinning copper removal, and the flow rate was 400 mL·min -1 , the reaction time is 4h, and the reaction temperature is 30°C. The reduced solution was evaporated and concentrated by h...

Embodiment 2

[0031] Take 1.6L of copper electrolyte, its composition is shown in Table 5, use an insoluble anode, the copper starting plate is the cathode, and the current density is 180A m -2 , copper electrolyte temperature is 65 ℃. When Cu in the copper electrolyte 2+ When the concentration drops to 24g / L, adjust the current density to 80A m -2 Electrowinning copper removal to Cu 2+ The concentration is 0.25g / L. The current density is 180A·m -2 The copper content of the obtained cathode was 99.27% ​​and the arsenic content was 0.0014%. The current density is 80A·m -2 45.9g of cathode product was obtained, in which the copper content was 81.6%, and the arsenic content was 5.98%.

[0032] Sulfur dioxide was introduced into the solution after electrowinning copper removal, and the flow rate was 500 mL·min -1 , the reaction time is 2h, and the reaction temperature is 60°C. The reduced solution was evaporated and concentrated by heating, cooled to -25°C and then filtered. The composi...

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PUM

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Abstract

The invention discloses a method for separating copper, arsenic and nickel and purifying a copper electrolyte, The method comprises the steps of: firstly, controlling current density by sections, and removing copper through electrodeposition; after removing the copper through electrodeposition, and introducing sulfur dioxide in a solution to reduce pentavalent As into tervalent As; and evaporating and concentrating the reduced solution, cooling and crystallizing, and recycling arsenic trioxide and nickel sulfate, thus, copper, arsenic and nickel are separated from the copper electrolyte, and the copper electrolyte is purified. The method disclosed by the invention has the advantages of simple process, low cost, good purification effect and great reduction of black copper powder, and realizes the opening of the As in a process of purifying the copper electrolyte.

Description

[0001] Technical field: [0002] The invention relates to a method for separating and purifying copper electrolyte from copper, arsenic and nickel. Background technique: [0003] In the copper electrolytic refining process, the anode efficiency is higher than the cathode efficiency, Cu 2+ Concentrations continue to rise and copper must be removed. At the same time, impurities Ni, Fe, As, Sb, Bi, etc. in the anode copper dissolve into the electrolyte and accumulate continuously. In order to ensure the quality of cathode copper and maintain normal production, the copper electrolyte must be purified. [0004] The main methods for purifying copper electrolyte include electrowinning, ion exchange, solvent extraction, and chemical precipitation. The induced decopper and arsenic removal method is widely used in the industry. The technology of purifying copper electrolyte by this method is mature, and the effect of removing As, Sb and Bi is good. However, a large amount of bla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/06C25C1/12
CPCY02P10/20
Inventor 郑雅杰彭映林崔涛张胜华柯浪
Owner 深圳慧欣环境技术有限公司
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